lumbosacral plexus

Question 1

5 major peripheral nerves of sacral plexus

Answer 1

superior gluteal nerve
inferior gluteal nerve
sciatic nerve
posterior femoral cutaneous nerve
pudendal nerve

Question 2

superior gluteal nerve originates from what nerve roots

Answer 2

L4, L5, S1

Question 3

Superior gluteal nerve is responsible for the motor innervation of what muscles

Answer 3

gluteus minimus
gluteus medius
tensor fasciae latae

Question 4

inferior gluteal nerve originates from what nerve roots

Answer 4

L5, S1, S2

Question 5

Inferior gluteal nerve is responsible for the motor innervation of what muscles

Answer 5

gluteus maximus

Question 6

sciatic nerve originates from what nerve roots

Answer 6

L4, L5, S1, S2, S3,

Question 7

Divisions of the sciatic nerve

Answer 7

dorsal - fibular L4 - S2

ventral - tibial - L4 - S3

Question 8

Tibial part of the sciatic nerve is responsible for the motor innervation of what muscles

Answer 8

all muscles of the posterior compartment of thigh except bicep femoris short head
adductor magnus
posterior compartment of lower leg
in sole foot

Question 9

fibular part of the sciatic nerve is responsible for the motor innervation of what muscles

Answer 9

short head bicep femoris
anterior lateral compartments of leg
extensor digitorum brevis of foot

Question 10

Tibial part of the sciatic nerve is responsible for the sensory innervation of what muscles

Answer 10

posterior lateral compartment of leg and sole of foot

Question 11

fibular part of the sciatic nerve is responsible for the sensory innervation of what muscles

Answer 11

anterior lateral compartment of leg dorsal aspect of foot

Question 12

posterior femoral nerve originates from what nerve roots

Answer 12

S1 -S3

Question 13

posterior femoral nerve is responsible for the sensory innervation of what muscles

Answer 13

posterior compartment of leg and perineum

Question 14

pudendal nerve originates from what nerve roots

Answer 14

S2-S4

Question 15

pudendal nerve innervates

Answer 15

external urethral and anal sphincter
pelvic bone
skeletal muscles of perineum

Question 16

causes of superior gluteal nerve damage

Answer 16

hip dislocation and hip fractures

Question 17

symptoms of superior gluteal nerve damage

Answer 17

loss of motor function gluteus medius

weakened abduction

Question 18

causes of inferior gluteal nerve damage

Answer 18

complications caused by hip replacement
trauma
entrapment
compression

Question 19

symptoms of inferior gluteal nerve damage

Answer 19

weakened leg extension
weakness in gluteus maximus
muscle atrophy of gluteus maximus

Question 20

causes of sciatic nerve damage

Answer 20

inflammation
compression
bone spurs of lower back
herniated disk

Question 21

symptoms of sciatic nerve damage

Answer 21

pain in lower back, buttock and back of legs
pain worsens with movement
numbness

Question 22

causes of posterior femoral nerve damage

Answer 22

direct trauma
fractured pelvis
tumours

Question 23

symptoms of posterior femoral nerve damage

Answer 23

numbness or tingling of the leg
muscle weakness
muscle cramping
sharp, jabbing pain
difficulty walking or extending the knee due to muscle weakness
atrophy, or shrinking, of the thigh muscles

Question 24

branches of the lumbar plexus

Answer 24

iliohypogastric 
ilioinguinal 
genitofemoral
lateral femoral cutaneous nerve
femoral nerve 
obturator nerve

Question 25

iliohypogastric nerve cutaneously innervates

Answer 25

skin over pubis | and lateral buttocks

Question 26

iliohypogastric nerve motorly innervates

Answer 26

internal obliques | transverse abdominis

Question 27

ilioinguinal nerve cutaneously innervates

Answer 27

skin on proximal and medial part of thigh

Question 28

ilioinguinal nerve motorly innervates

Answer 28

internal obliques | transverse abdominis

Question 29

nerve root of iliohypogastric nerve

Answer 29

L1 and T12

Question 30

nerve root of ilioinguinal nerve

Answer 30

L1

Question 31

Motor innervation from genitofemoral nerve to

Answer 31

cremasteric muscle

Question 32

sensory innervation from genitofemoral nerve to

Answer 32

kin of the anterior scrotum (in males) or the skin over mons pubis and labia majora (in females). The femoral branch innervates the skin on the upper anterior thigh.

Question 33

nerve root of genitofemoral nerve

Answer 33

L1, L2

Question 34

nerve root of lateral cutaneous nerve

Answer 34

L2, L3

Question 35

Sensory innervation from lateral cutaneous nerve to

Answer 35

anterior and lateral thigh down to the level of the knee.

Question 36

nerve root of obturator nerve

Answer 36

L2-L4

Question 37

Motor innervation from obturator nerve to

Answer 37

muscles of medial thigh | the obturator externus, adductor longus, adductor brevis, adductor magnus and gracilis.

Question 38

sensory innervation from obturator nerve to

Answer 38

skin over medial thigh

Question 39

nerve root of femoral nerve

Answer 39

L2-4

Question 40

Motor innervation from femoral nerve to

Answer 40

muscles of the anterior thigh – the illiacus, pectineus, sartorius and quadriceps femoris.

Question 41

sensory innervation from femoral nerve to

Answer 41

skin on the anterior thigh and the medial leg.